87115855 has 32 divisors (see below), whose sum is σ = 115315200. Its totient is φ = 62923392.

The previous prime is 87115849. The next prime is 87115909. The reversal of 87115855 is 55851178.

It is a 7-Lehmer number, since φ(87115855) divides (87115855-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 87115855 - 2⁷ = 87115727 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283612 + ... + 283918.

It is an arithmetic number, because the mean of its divisors is an integer number (3603600).

Almost surely, 2^87115855 is an apocalyptic number.

87115855 is a deficient number, since it is larger than the sum of its proper divisors (28199345).

87115855 is a wasteful number, since it uses less digits than its factorization.

87115855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463.

The product of its digits is 56000, while the sum is 40.

The square root of 87115855 is about 9333.5874667782. The cubic root of 87115855 is about 443.3013642063.

The spelling of 87115855 in words is "eighty-seven million, one hundred fifteen thousand, eight hundred fifty-five".